Where was the Frankenstein film series filmed?

The Frankenstein film series has 4 titles (1957 to 1974). Wikidata records no filming place for them; Wikipedia names Los Angeles, Windsor, Universal Studios Hollywood, Wexham, Bray Studios and 2 more places. Every place links to its source.

The productions, in order

Named in Wikipedia's own articles

Places named only in the titles’ Wikipedia articles.